1  /* SPDX-License-Identifier: GPL-2.0-only */
  2  
  3  #include <commonlib/device_tree.h>
  4  #include <console/console.h>
  5  #include <helpers/file.h>
  6  #include <stddef.h>
  7  #include <stdint.h>
  8  #include <stdio.h>
  9  #include <stdlib.h>
 10  #include <string.h>
 11  #include <tests/test.h>
 12  
 13  static int setup_device_tree_test_group(void **state)
 14  {
 15  	/*
 16  	 * fattest FDT I could find from Linux Kernel to test the worst cases
 17  	 * https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/nvidia/tegra30-ouya.dts?id=443b349019f2d946
 18  	 */
 19  	const char dtb_path[] = "lib/devicetree-test/tegra30-ouya.dtb";
 20  	int file_size = test_get_file_size(dtb_path);
 21  	assert_int_not_equal(file_size, -1);
 22  
 23  	void *big_fat_dtb = test_malloc(file_size);
 24  	assert_int_not_equal(big_fat_dtb, NULL);
 25  	assert_int_equal(test_read_file(dtb_path, big_fat_dtb, file_size), file_size);
 26  	*state = big_fat_dtb;
 27  
 28  	return 0;
 29  }
 30  
 31  static int teardown_device_tree_test_group(void **state)
 32  {
 33  	test_free(*state);
 34  	return 0;
 35  }
 36  
 37  static void test_fdt_find_node_by_path(void **state)
 38  {
 39  	uint32_t addrcp, sizecp;
 40  	assert_int_equal(0, fdt_find_node_by_path(*state, "test", &addrcp, &sizecp));
 41  	assert_int_equal(56, fdt_find_node_by_path(*state, "/", &addrcp, &sizecp));
 42  	assert_int_equal(2, addrcp);
 43  	assert_int_equal(1, sizecp);
 44  	assert_int_equal(0, fdt_find_node_by_path(*state, "/test", &addrcp, &sizecp));
 45  	assert_int_equal(0x181f4, fdt_find_node_by_path(*state, "/chosen", &addrcp, &sizecp));
 46  	assert_int_equal(1, addrcp);
 47  	assert_int_equal(1, sizecp);
 48  	assert_int_equal(0x156d4, fdt_find_node_by_path(*state, "/cpus", &addrcp, &sizecp));
 49  	assert_int_equal(1, addrcp);
 50  	assert_int_equal(1, sizecp);
 51  	assert_int_equal(0x1517c, fdt_find_node_by_path(*state, "/usb@7d004000/ethernet@2", &addrcp, &sizecp));
 52  	assert_int_equal(1, addrcp);
 53  	assert_int_equal(0, sizecp);
 54  	assert_int_equal(0x1517c, fdt_find_node_by_path(*state, "/usb@7d004000/ethernet@2/", &addrcp, &sizecp));
 55  	assert_int_equal(1, addrcp);
 56  	assert_int_equal(0, sizecp);
 57  
 58  	assert_int_equal(0xee08, fdt_find_node_by_path(*state, "/pinmux@70000868/pinmux/drive_groups",
 59  						       &addrcp, &sizecp));
 60  }
 61  
 62  static void test_fdt_find_subnodes_by_prefix(void **state)
 63  {
 64  	uint32_t offset = fdt_find_node_by_path(*state, "/cpus", NULL, NULL);
 65  	uint32_t results[3] = { 0 };
 66  	uint32_t addrcp, sizecp;
 67  	size_t count_results = fdt_find_subnodes_by_prefix(*state, offset, "cpu@",
 68  							   &addrcp, &sizecp, results, 3);
 69  	assert_int_equal(3, count_results);
 70  	assert_int_equal(0x15700, results[0]);
 71  	assert_int_equal(0x157a0, results[1]);
 72  	assert_int_equal(0x15840, results[2]);
 73  
 74  	results[1] = 0xDEADBEEF;
 75  	results[2] = 0xDEADBEEF;
 76  	count_results = fdt_find_subnodes_by_prefix(*state, offset, "cpu@",
 77  							   &addrcp, &sizecp, results, 1);
 78  	assert_int_equal(1, count_results);
 79  	assert_int_equal(0x15700, results[0]);
 80  	assert_int_equal(0xDEADBEEF, results[1]);
 81  	assert_int_equal(0xDEADBEEF, results[2]);
 82  }
 83  
 84  static void test_fdt_find_node_by_alias(void **state)
 85  {
 86  	assert_int_equal(0xf298, fdt_find_node_by_alias(*state, "serial0", NULL, NULL));
 87  	assert_int_equal(0, fdt_find_node_by_alias(*state, "mmc2", NULL, NULL));
 88  }
 89  
 90  static void test_fdt_find_prop_in_node(void **state)
 91  {
 92  	uintptr_t cnode_offset = fdt_find_node_by_path(*state, "/clock", NULL, NULL);
 93  	uintptr_t mnode_offset = fdt_find_node_by_path(*state, "/memory@80000000", NULL, NULL);
 94  	assert_int_equal(0x18400, cnode_offset);
 95  
 96  	struct fdt_property fdt_prop;
 97  	assert_int_equal(0x1840c, fdt_read_prop(*state, cnode_offset, "compatible", &fdt_prop));
 98  	assert_string_equal("fixed-clock", (char *)fdt_prop.data);
 99  	assert_int_equal(0x6094, fdt_read_prop(*state, mnode_offset, "reg", &fdt_prop));
100  	assert_int_equal(0x0, fdt_read_prop(*state, cnode_offset, "notfound", &fdt_prop));
101  }
102  
103  static void test_fdt_read_reg_prop(void **state)
104  {
105  	uint32_t addrcp1, sizecp1, addrcp2, sizecp2;
106  	uint64_t node_offset1 = fdt_find_node_by_path(*state, "/memory@80000000", &addrcp1, &sizecp1);
107  	uint64_t node_offset2 = fdt_find_node_by_path(*state, "/reserved-memory/ramoops@bfdf0000", &addrcp2, &sizecp2);
108  
109  	struct device_tree_region regions[3];
110  	regions[0].addr = 0xDEADBEEF;
111  	regions[0].size = 0xDEADBEEF;
112  	fdt_read_reg_prop(*state, node_offset1, addrcp1, sizecp1, regions, 0);
113  	assert_int_equal(0xDEADBEEF, regions[0].addr);
114  	assert_int_equal(0xDEADBEEF, regions[0].size);
115  	fdt_read_reg_prop(*state, node_offset2, addrcp2, sizecp2, regions, 1);
116  	assert_int_equal(0xbfdf0000, regions[0].addr);
117  	assert_int_equal(0x00010000, regions[0].size);
118  }
119  
120  int main(void)
121  {
122  	const struct CMUnitTest tests[] = {
123  		cmocka_unit_test(test_fdt_find_node_by_path),
124  		cmocka_unit_test(test_fdt_find_subnodes_by_prefix),
125  		cmocka_unit_test(test_fdt_find_node_by_alias),
126  		cmocka_unit_test(test_fdt_find_prop_in_node),
127  		cmocka_unit_test(test_fdt_read_reg_prop),
128  	};
129  
130  	return cb_run_group_tests(tests, setup_device_tree_test_group,
131  			teardown_device_tree_test_group);
132  }